chore: add prismjs for syntax highlighting

1 files changed, 56 insertions, 0 deletions

diff --git a/public/prism/prism-less.js b/public/prism/prism-less.js
new file mode 100644
index 0000000..e4703a3
--- /dev/null
+++ b/public/prism/prism-less.js
@@ -0,0 +1,56 @@
+/* FIXME :
+ :extend() is not handled specifically : its highlighting is buggy.
+ Mixin usage must be inside a ruleset to be highlighted.
+ At-rules (e.g. import) containing interpolations are buggy.
+ Detached rulesets are highlighted as at-rules.
+ A comment before a mixin usage prevents the latter to be properly highlighted.
+ */
+
+Prism.languages.less = Prism.languages.extend('css', {
+  comment: [
+    /\/\*[\s\S]*?\*\//,
+    {
+      pattern: /(^|[^\\])\/\/.*/,
+      lookbehind: true,
+    },
+  ],
+  atrule: {
+    pattern:
+      /@[\w-](?:\((?:[^(){}]|\([^(){}]*\))*\)|[^(){};\s]|\s+(?!\s))*?(?=\s*\{)/,
+    inside: {
+      punctuation: /[:()]/,
+    },
+  },
+  // selectors and mixins are considered the same
+  selector: {
+    pattern:
+      /(?:@\{[\w-]+\}|[^{};\s@])(?:@\{[\w-]+\}|\((?:[^(){}]|\([^(){}]*\))*\)|[^(){};@\s]|\s+(?!\s))*?(?=\s*\{)/,
+    inside: {
+      // mixin parameters
+      variable: /@+[\w-]+/,
+    },
+  },
+
+  property: /(?:@\{[\w-]+\}|[\w-])+(?:\+_?)?(?=\s*:)/,
+  operator: /[+\-*\/]/,
+});
+
+Prism.languages.insertBefore('less', 'property', {
+  variable: [
+    // Variable declaration (the colon must be consumed!)
+    {
+      pattern: /@[\w-]+\s*:/,
+      inside: {
+        punctuation: /:/,
+      },
+    },
+
+    // Variable usage
+    /@@?[\w-]+/,
+  ],
+  'mixin-usage': {
+    pattern: /([{;]\s*)[.#](?!\d)[\w-].*?(?=[(;])/,
+    lookbehind: true,
+    alias: 'function',
+  },
+});